在美国,US EPA方法1633已成为分析非饮用水基质、土壤、生物固体和组织中PFAS的基础方法。该方法包括使用弱阴离子交换(WAX)固相萃取(SPE)进行样品前处理和石墨化炭黑(GCB)净化的步骤。本应用纪要是一系列展示执行EPA 1633方法综合解决方案文档中的...
and establish a "grandfather" provision for permit applications if a draft permit or preliminary determination has been issued for public comment by the date the revised PM NAAQS go into effect. In addition to the CAA requirement for states to submit implementation plans, EPA acts to control NAAQ...